Show volume on a DC

[ReynaldoECG]

Hi. I want to show the Volume of the geometry in a DC, to later calculate quantities and costs.
I used this code:

Sketchup.active_model.selection.grep(Sketchup;;ComponentInstance).each do |s|
    if s.volume>-1
      s.set_attribute "dynamic_attributes","vol_inch", s.volume 
      s.set_attribute "dynamic_attributes","volumen_mm", "0"
      s.set_attribute "dynamic_attributes", "_volumen_mm_access","VIEW"
      s.set_attribute "dynamic_attributes","_volumen_mm_formlabel","Volume (cubic ft) " 
      s.set_attribute "dynamic_attributes","_volumen_mm_formula", "ROUND(vol_inch*16387.064,3)"
    end     
    $dc_observers.get_latest_class.redraw_with_undo(s)
 end

Works. But when I modify the geometry the volume does not change.
Is there a way to get the volume in a DC constantly and dynamically as the geometry changes?

[pcmoor]

look at

https://sketchucation.com/forums/viewtopic.php?f=289&t=51443